[randallsquared]

I think for skeptics of anthropogenic warming, the main problem is that proponents appear to be interested in politics as much as or more than in science. This just isn't the case for internal combustion, black holes, or even evolution.

Also, it's easy to fully agree that warming has been happening (over hundreds of years, at least), and still be skeptical that humans are driving the change, what with the Medieval Warm, the Little Ice Age, etc.